Collaborative consumption, often associated with the sharing economy, takes place in organized systems or networks, in which participants conduct sharing activities in the form of renting, lending, trading, bartering, and swapping of goods, services, transportation solutions, space, or money. In this paper, a framework on the determinants of choosing a sharing option is developed and tested with two quantitative studies by applying partial least squares path modeling analysis. In study 1, users of the B2C car sharing service car2go (N = 236), and in study 2, users of the C2C online community accommodation marketplace Airbnb (N = 187) are surveyed. The results reveal the satisfaction and the likelihood of choosing a sharing option again to be predominantly explained by determinants serving users’ self-benefit. Utility, trust, cost savings, and familiarity were found to be essential in both studies, while service quality and community belonging were identified solely in study 1. Four proposed determinants had no influence on any of the endogenous variables. This applies to environmental impact, internet capability, smartphone capability, and trend affinity. Finally, research and managerial implications are discussed.